Officers are appealing for information about a New Year’s Day altercation in which a man brandished a knife at Highbury and Islington station.
It happened on a stationary Victoria line train just after 6am. The confrontation then spilled out onto the platform.
British Transport Police was called and a 51-year-old man was arrested on suspicion of possessing an offensive weapon.
He has since been released under investigation. Officers are now trying to find out what happened in the run-up to the incident.
A transport police spokesperson said: “Knife crime and violence such as this will never be tolerated on the rail network. Officers are working hard to establish the full circumstances leading to this incident occurring.”
Anyone with information is asked to call 0800 40 50 40, quoting reference 184 of January 1, 2018. Alternatively, call Crimestoppers anonymously on 0800 555 111.
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